https://www.cnblogs.com/hackyo/p/11471385.html
tee /usr/lib/systemd/system/canal.service << "EOF"
[Unit]
Description=canal
After=network.target
[Service]
Type=forking
ExecStart=/usr/local/canal/bin/startup.sh
ExecStop=/usr/local/canal/bin/stop.sh
PrivateTmp=true
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload